Fixing heater comprising electrically conductive member extending in the longitudinal axis of substrate.

摘要

A fixing heater includes a ceramic substrate (4); a heat generating resistor (5) provided on the ceramic substrate (4) to extend in a longitudinal axis of the ceramic substrate; a temperature detecting element (6) for detecting a temperature of the ceramic substrate (4); and an electrically conductive member (29) provided on the ceramic substrate to extend in the longitudinal axis of the ceramic substrate. The power supplied to the heat generating resistor (5) is interrupted when no current is flowing through the conductive member (29).